This year I planted 16 fruit trees in my yard. They were all bare root and came from various places. They were doing very well until this week when i noticed some of the leaves on my santa rosa and elelphant heart plum had segments of brown in them. I have also noticed that some of my peaches are getting leaves that are fading from green to gold to yellow. I have included some pictures and i was just hoping to get the take of the community of people here on possible causes and identification. Thank you in advance. I water 1 to 2 times a week depending on how hot it is.

Here is the santa rosa with about 4 months of growth

Here are some close ups on the leaves

Here are some pictures of the peaches, this is a mercrest nectarine with about 3 months of growth

Here is a fruit salad tree viewing gold dust peach leaves